Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantas pessoas chamadas Nick Lucas estão no programa?
 ###Tabelas: CREATE TABLE finals (finals_id AUTO_INCREMENT PRIMARY KEY, Year INT, Champion VARCHAR, Runner-up VARCHAR, Score VARCHAR, City VARCHAR, Venue VARCHAR) CREATE TABLE ique_game_boy_advance (ique_game_boy_advance_id AUTO_INCREMENT PRIMARY KEY, Chinese Title VARCHAR, Pinyin VARCHAR, Released Date INT, Genre VARCHAR, Game Modes VARCHAR) CREATE TABLE summary_table (summary_table_id AUTO_INCREMENT PRIMARY KEY, Source VARCHAR, Chrome VARCHAR, Internet Explorer VARCHAR, Firefox VARCHAR, Safari VARCHAR, Opera VARCHAR, Other VARCHAR) CREATE TABLE former_medical_schools (former_medical_schools_id AUTO_INCREMENT PRIMARY KEY, Province VARCHAR, School VARCHAR, City VARCHAR, Degree VARCHAR, Established INT, Closed VARCHAR) CREATE TABLE cast_members (cast_members_id AUTO_INCREMENT PRIMARY KEY, Character VARCHAR, Portrayed by VARCHAR, Main cast seasons VARCHAR, Recurring cast seasons VARCHAR, # of episodes INT)  
SELECT COUNT Portrayed by FROM cast_members WHERE Character = Nick Lucas